Speaker
Luis Eduardo Vieira
(National Institute for Space Research)
Description
We reconstruct the Sun’s full-sphere luminosity over Solar Cycles 23 and 24 using a semi-empirical Total Solar Irradiance model driven by sunspot, facular, and network observations. Our results show peak luminosity enhancements of ∼0.14% at cycle maximum relative to minimum in Cycle 23, with a reduced amplitude in Cycle 24. Differences between Earth-viewed TSI and full-sphere output highlight the role of active-region geometry in modulating observed irradiance. These cycle-scale luminosity variations provide essential benchmarks for stellar dynamo models and underscore the value of off-ecliptic irradiance measurements in fully characterizing solar-cycle forcing.
Primary author
Luis Eduardo Vieira
(National Institute for Space Research)
